United Kingdom Income Tax Calculator
Free United Kingdom Income Tax Calculator. Enter your figures and get the tax, net and total instantly, with the formula shown.
Your results
- Taxable income
- –
- Income tax
- –
- Effective rate (%)
- –
- Net income
- –
- Monthly net
- –
Estimates for planning only, not tax advice. Rates change; confirm with your tax authority or a qualified adviser.
How to use this calculator
- Enter your figures in the fields above.
- Check the rate. It is prefilled with the standard rate on file; change it if yours differs.
- Results update as you type. Press Reset to start over.
Formula used
Taxable income = max(0, [Annual income] − [Deductions ÷ allowance])
Income tax = ƒ([Taxable income])
Effective rate = [Income tax] ÷ [Annual income] × 100
Net income = [Annual income] − [Income tax]
Monthly net = [Net income] ÷ 12
Tax brackets used (2025/26, GBP)
| Taxable income | Tax rate (%) |
|---|---|
| 0 – 37,700 | 20% |
| 37,700 – 112,570 | 40% |
| 112,570 and above | 45% |
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Frequently asked questions
How does the United Kingdom Income Tax Calculator work?
It applies the formula shown on this page to the figures you enter and updates the result instantly in your browser. Nothing you type is sent to a server.
Is the default rate always correct?
The default is the standard rate on file when the page was published. Reduced rates, local surcharges and exemptions can apply, so edit the rate field to match your situation.
Is this calculator free?
Yes. Every calculator on this site is free, needs no sign-up and works on phones, tablets and desktops.